you think, why you think this and they say they never got a response. >>theobamaadministrationhas okayed the suspension of the suspect's miranda rights. is that a temporary suspension? >> reporter: yes, by law it is. it's called the public safety exception to the miranda rule. normally you have to tell someone they have a right to remain silent and if you don't, then you can't use anything they tell you in court. so that's why the miranda warning is given. but there is an exception. you don't have to do it if there's a possible threat to public safety. and here obviously there's a concern about whether there are potential accomplices. investigators say they haven't found any. or other explosives. they say they haven't found any of those either but that's what they want to ask him. and this exception probably begins to expire the moment you invoke it so it's probably no good for more than a day or two but nonetheless they can do that. afterwards they'll have to give him his miranda warning and say whether he'll continue to answer questions. the justice department says even in very